博客
关于我
java中随机生成26个字母组合的随机验证码
阅读量:593 次
发布时间:2019-03-11

本文共 585 字,大约阅读时间需要 1 分钟。

实现原理,通过随机生成1-52的随机数,然后从定义好的字母数字中取元素进行组合。

下面是代码:

public static void login(){   		String [] yan ={   				"a","b","c","d","e","f","g","h",				"i","j","k","l","m","n","o","p","q",				"r","s","t","u","v","w","x","y","z",				"A","B","C","D","E","F","G","H",				"I","J","K","L","M","N","O","P","Q",				"R","S","T","U","V","W","X","Y","Z",};		int a = (int)(Math.random()*52);		int b = (int)(Math.random()*52);		int c = (int)(Math.random()*52);		int d = (int)(Math.random()*52);		String yanzhengma = yan[a]+yan[b]+yan[c]+yan[d];		System.out.println(yanzhengma);			}

也可以自行扩展实现数字加字母组合的验证码。

欢迎关注哦:

在这里插入图片描述

转载地址:http://ddktz.baihongyu.com/

你可能感兴趣的文章
nmap指纹识别要点以及又快又准之方法
查看>>
Nmap渗透测试指南之指纹识别与探测、伺机而动
查看>>
Nmap端口扫描工具Windows安装和命令大全(非常详细)零基础入门到精通,收藏这篇就够了
查看>>
NMAP网络扫描工具的安装与使用
查看>>
NMF(非负矩阵分解)
查看>>
nmon_x86_64_centos7工具如何使用
查看>>
NN&DL4.1 Deep L-layer neural network简介
查看>>
NN&DL4.3 Getting your matrix dimensions right
查看>>
NN&DL4.7 Parameters vs Hyperparameters
查看>>
NN&DL4.8 What does this have to do with the brain?
查看>>
nnU-Net 终极指南
查看>>
No 'Access-Control-Allow-Origin' header is present on the requested resource.
查看>>
No 'Access-Control-Allow-Origin' header is present on the requested resource.
查看>>
NO 157 去掉禅道访问地址中的zentao
查看>>
no available service ‘default‘ found, please make sure registry config corre seata
查看>>
No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
查看>>
no connection could be made because the target machine actively refused it.问题解决
查看>>
No Datastore Session bound to thread, and configuration does not allow creation of non-transactional
查看>>
No fallbackFactory instance of type class com.ruoyi---SpringCloud Alibaba_若依微服务框架改造---工作笔记005
查看>>
No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalanc
查看>>